G.f. A(x) satisfies: A( x*A(x) - x*A(x)^3 ) = x^2.

Terms

a(0) =1a(1) =1a(2) =2a(3) =9a(4) =41a(5) =195a(6) =973a(7) =5063a(8) =27023a(9) =147147a(10) =814736a(11) =4573323a(12) =25964578a(13) =148836155a(14) =860244693a(15) =5007774327a(16) =29335134676a(17) =172795403961